In rarefied gas dynamics, the continuum assumption is no longer applicable and one has to rely on a more general description of the physical system at hand, which is given by kinetic equations such as the Boltzmann equation [1]}.
These equations arise in a variety of other applications as well, such as neutron transport [2]}, radiative transport [3]} and semiconductors [4]}.
The Boltzmann equation is a high dimensional integro-differential equation, with phase space dependency on time, space and particle velocity. This high dimensionality of the phase space presents a severe computational challenge for massive numerical simulations.
